I'm gonna write about everything I have so far like, worldbuilding wise
There is a witch world. However, it has to be accessed with a portal. In recent years, the witching world has fallen to tyranny and corruption and lots of magic is outlawed.
(I hope this doesn't sound like demonization of the LGBT community because that's not what I'm going for, it's just an analogy) I feel like witches are a lot like the LGBT community. They don't choose to be who they are, and in much more modern, recent years have become more widely understood by most people. Since a lot of religions are against witchcraft, it makes sense that places like the South still have a hatred and misunderstanding of witches because many people in the South are religious and close-minded.
For the most part (this is another thing I struggle with) witches don't really use verbal spells. It's all about silent verbal and hand magic. Potions, spell books, and other sorcery things are in there somewhere. I don't really know how to explain how someone would be able to cast non-verbal spells, and how others are obviously better and more efficient than others., but it definetly is something you learn through practice, reading spell-books, etc.
Now here's a big part I'm struggling with. There's somehow different forms of magic. By that I mean, different forms of spells a witch can naturally cast. For example, all witches can learn things like teleportation, time freezing, and combat spells. But if a witch is a Night Witch they are the only witch type that can cast spells specifically related to the darkness and dark magic.
Different witch types have different colored eyes when they cast spells. Normal Witches don't specialize in any elemental magic, and are just naturally better at learnt spells, and their eyes turn white-light blue when casting spells and the more experienced in a spell or whatever they are, then the brighter their eyes are. Night witches have either emerald green or purple eyes, and as previously stated, are good at dark arts. Healing Witches are good at things relating to fertility, healing, health, and nature, and their eyes turn hazel. Another type of witch (haven't discovered a name yet) specializes in water, light, and ice, and their eyes turn silver. The last type of witch specialize in something related specifically to combat, and their eyes turn red.
Another thing I want to keep in mind is there is still some prejudice toward the witches with purple, green, or red eyes, since the witch types they represent have potentially violent tendencies and abilities. Two characters in the book fit the prejudice, and are violent people. However, the other two with dark magic ability choose to do good in the world and not be evil.
Another thing about the religion and witches thing. One of the main characters, Nattie, is your typical Catholic Italian good-girl from Manhattan. She also happens to be a healing witch. The issue with that is…how do I explain that she is both religious, and a witch? One of the other girls, Yvonne, is Jewish and while she isn't a witch herself, she is friends with many witches and rather than be against them because of her religion, she is fascinated and always reads about their history and spells.
The reason I had the whole "witches suck at mental health" thing is because Kylie, main character, is sent to a mental hospital (more of a lunatic asylum) for witches as a child so she can forget about her powers and witch parents, and have a normal life after they are killed. I believe witches shouldn't understand mental health much because they think that a mental illness is actually a curse or hex, or think they can cure everything with a wand and magic spell.
The final thing is about the ending. In the end, the now adult Kylie creates a sorcery school for witches. It isn't required they attend sorcery school, but many do. That's the whole reason why being a witch needs to be a well-known, public thing. Because how else would there be a school for sorcery? What happens if a mortal (non-witch) tries to attend? How would people know about the school and be notified about it if they weren't public about them being witches? The Harry Potter books have their own explanation as to why Muggles can't see or interact with Hogwarts, but I don't really wanna use the same thing because that's just straight plagairism.